Copernicium (Cn)
Copernicium is the chemical element with atomic number 112 and symbol Cn. It is a inconnu in period 7, group 12, with a standard atomic weight of 285 u.
Predicted classification. No bulk chemistry has been measured for this element.
Faits essentiels
- Z
- 112
- Atomic weight
- 285 u no stable isotope
- Category
- inconnu
- State at 298 K
- Unknown
- Occurrence
- synthetic, radioactive
- Discovered
- 1996
- CAS
- 54084-26-3
Configuration électronique
- Noble gas notation
- [Rn] 5f¹⁴ 6d¹⁰ 7s²
- Full notation
- 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 4f¹⁴ 5s² 5p⁶ 5d¹⁰ 5f¹⁴ 6s² 6p⁶ 6d¹⁰ 7s²
- Electrons per shell
- 2, 8, 18, 32, 32, 18, 2